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how do i calculate the size of my dehumidifier

by Lorenz Walsh Published 3 years ago Updated 2 years ago
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To find the right size dehumidifier for your entire house you have to calculate the square footage of the area. A 70-pint dehumidifier can cover 3,800 square feet. With every 400 feet added to area, add 30 pint to the dehumidifier. This also depends on the moisture removal requirement of the home.

Dehumidifier capacity is rated by the amount of moisture removed in 24 hours, so a 30-pint humidifier is rated to remove 30 pints of moisture in one day. Use a 30-pint dehumidifier (or a unit between 24- and 39-pint capacity) in the following conditions: Damp rooms of 500-1,500 square feet.

Full Answer

How to determine what size dehumidifier you need?

  • First, you need to convert relative to absolute humidity. ...
  • Subtract present humidity from desired humidity. ...
  • Multiply this number by the volume of the room (room size above) to get the total volume of water to be removed from the room.
  • The volume assumes an air exchange ratio of 1. ...

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How big of a dehumidifier do I Need?

What size dehumidifier do I need for 2,500 square feet? Some 40 pint and 50-pint dehumidifiers can cover an area of 2,000 square feet to 2,500 square feet effectively. However, it is best recommended to go for a 60-pint or 70-pint dehumidifier for spaces above 2,000 square feet for perfect humidity control.

How do I calculate for size of dehumidifier?

  • For a space that's 500 square feet (46 m 2 ), a dehumidifier with a 10 US pt (4.7 L) capacity should work.
  • If your space is 1,000 square feet (93 m 2 ), get a 14 US pt (6.6 L) dehumidifier.
  • For a 1,500 sq ft (140 m 2) space, get a 18 US pt (8.5 L) dehumidifier.
  • For a 2,000 sq ft (190 m 2) space, get a 22 US pt (10 L) dehumidifier.

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How do you choose the size of a dehumidifier?

To clarify this further, there are three main considerations when choosing a dehumidifier size:

  • The size of the environment you want to dehumidify. This should be measured in square metres, as that’s the unit quoted by manufacturers in the UK.
  • The level of moisture in the environment. This is a more subjective measure, unless you use a humidity monitor. ...
  • The temperature of the environment (more on this in a minute).

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What is the size of dehumidifier for 2000 sq ft home?

50-Pint Dehumidifier40 or 50-Pint Dehumidifier – This is the size recommended for areas up to 2000 square feet that feel damp and smell musty all the time, or in which moisture can be seen on the walls, or in which you've dealt with mold growth in the past.

What size dehumidifier do I need for a 1500 sq ft basement?

Sizing ChartConditions300 – 500 Sq.Ft.1,500 – 2,500 Sq.Ft.Moderately Damp10-pint50-pintVery Damp20- or 30-pint50- or 60-pintWet40- or 50-pint70-pintExtremely Wet50-pint70- or 100-pintFeb 26, 2022

How much space does a 50-pint dehumidifier cover?

For example, if you have a 500 sq ft basement with medium humidity (70%-80%), you would need a 50-pint dehumidifier. That's a ballpark figure. Note that some producers might be throwing around numbers like 3,000 sq ft or 4,500 sq ft.

How do you calculate the area of a dehumidifier?

You need to provide dehumidification capacity for three air changes per hour (ACH).Volume = 100 x 50 x 50 = 250,000 cu. ft.SCFM = 250,000 / 60 = 4,167 SCFM.Dehumidification capacity = 4,167 SCFM x 3 ACH = 12,501 SCFM.

Can you get too big of a dehumidifier?

Dodds told us: "If you get a dehumidifier that is too large for the space then there is the possibility that it will make the air excessively dry and uncomfortable to be around." Excessive dryness in your home can have negative connotations for your skin and indoor living organisms such as plants.

Can you dehumidify too much?

Using the Dehumidifier Too Often By leaving all the windows closed, the air will be unable to flow freely, and will start to become damp again. This will affect your health, as you may start sneezing and sniffling. This could be due to mold growth in the home.

How many square feet does a 60 pint dehumidifier cover?

Dehumidifier for 400 – 2,500 sq ftRoom Size (sq ft)Dehumidifier Size (Pints)1,200 sq ft60 pints1,500 sq ft65 pints2,000 sq ft70 pints2,500 sq ft80 pints6 more rows•Jul 22, 2022

What does pint size mean on dehumidifier?

What is a “pint” in dehumidifiers? A dehumidifier's pint capacity is the amount of moisture (in pints) that it is capable of removing from an area in a 24-hour period. It is important to remember that a dehumidifier's performance can be affected by both the size and humidity level of a given area.

Is a 40 pint dehumidifier enough for basement?

40 to 50-Pint Dehumidifiers They are ideal for a damp basement or room, with clear indications of excess moisture, such as visible mold growth, damp stains, and musty odors.

How do I choose a dehumidifier for my basement?

Size of the basement and the right-size dehumidifier So a 1,500-square-foot basement would need a dehumidifier with about an 18-pint capacity. And if the basement is very damp, they recommend a dehumidifier that holds 12 pints of water for a 500-square-foot space and five pints for every additional 500 square feet.

What size dehumidifier do I need for 400 square feet?

For a standard, 2-car garage, you're looking at around 400 sq. ft. of space. Assuming a humidity level of around 70%, you'll need a 25-pint dehumidifier (2020 standard).

What size dehumidifier do I need for my bathroom?

Due to the often compact space of a bathroom, you won't need a large dehumidifier. However, it's important to consider the tank size. Since it will be extracting a significant amount of moisture, a small tank has to be emptied often. We've found that a 30-pint dehumidifier is an excellent size for most bathrooms.

How big of a dehumidifier do I need for my basement?

Select a small one that can hold 10 pints of water for a 500-square-foot space; add 4 pints of capacity for every additional 500 square feet. So, to determine the size of humidifier for a 1,000-square-foot basement, you'd need to add 4 pints for a total 14-pint capacity.

How do I choose a dehumidifier for my basement?

Size of the basement and the right-size dehumidifier So a 1,500-square-foot basement would need a dehumidifier with about an 18-pint capacity. And if the basement is very damp, they recommend a dehumidifier that holds 12 pints of water for a 500-square-foot space and five pints for every additional 500 square feet.

How big of a dehumidifier do I need for 1200 square feet?

Use a 50-pint dehumidifier (or a unit between 40- and 59-pint capacity) in the following conditions: Damp rooms of 2,000-2,500 square feet. Very damp rooms of 1,500-2,000 square feet. Wet rooms of 1,000-1,500 square feet.

Where should dehumidifier be placed in basement?

Placing your dehumidifier near the source of moisture will be more efficient. Your dehumidifier will capture humidity before it has a chance to infiltrate other areas.

What Size Dehumidifier Do I Need?

The Dehumidifier Size Calculator answers how many pin ts of capacity you require to dry your basement, bedroom, or home.

How many pints per day for a dehumidifier?

Often you'll see a dehumidifier with specs like 100 pints per day, rated something like 70 pints by the AHAM standards.

Can you measure relative humidity?

For temperature and relative humidity: Some people will actually get a humidity monitor to measure the relative humidity. It's useful if you need to keep the humidity below a certain %. For most humidity problems, the calculator lets you approximate relative humidity by how the room looks and feels.

Is a dehumidifier energy star certified?

Yes, all the dehumidifiers recommendations are Energy Star certified. Cheaper to run, easier on the environment.

Dehumidifier Size Chart – How Big

The typical dehumidifier comes in a range of sizes from Mini to Xtra large. The size refers to pints of water. The number of pints of moisture the appliance can remove every day (24-hour period).

Dehumidifier Drainage

How many pints of moisture the appliance will remove from the air each day is the key point.

Things To Consider

The size of your room is important. When it comes to picking the right size dehumidifier, room size is not the only consideration.

How to measure for a dehumidifier?

When choosing a dehumidifier, you'll need to take into account the size of the space you're trying to dehumidify. If you don't already know how big the space is, use a measuring tape to measure the length and width of the floor.

How to determine what kind of dehumidifier to use?

Simply look for a dehumidifier that is rated for the size (in square feet or meters) and dampness level of your space.

What is the best dehumidifier for a hot and humid room?

Buy a refrigerant model for a hot and humid space. If your space is consistently hot and humid, a refrigerant dehumidifier may be your best bet. These dehumidifiers tend to have higher capacity ratings and operate more efficiently at high temperatures than desiccant models.

What is the best dehumidifier for a cooler environment?

Pick a desiccant dehumidifier for a cooler environment. Dehumidifiers come in 2 basic types: desiccant and refrigerant. While desiccant humidifiers tend to have lower capacity ratings than refrigerant models, they operate much more efficiently in lower temperatures. In general, it's best to use a desiccant dehumidifier if the temperature in your space will fall below 65 °F (18 °C).

How much water can a dehumidifier pull out of the air?

Get a dehumidifier with a capacity of 10–26 US pints (4. 7–12.3 L) for a moderately damp space. The “size” of a dehumidifier actually refers to its capacity—that is, how much water it can pull out of the air in a 24-hour period. If your space is only somewhat damp, you won't need a super high-capacity dehumidifier. The total capacity you need will depend on how big your space is. For example: [10]

What is a dehumidifier?

Dehumidifiers are helpful for removing excess moisture from indoor spaces, thus reducing water damage and harmful mold and mildew growth. However, these appliances come in a wide range of sizes and capacities, so you may be having a hard time figuring out which dehumidifier is the right size for your space.

How big is a whole house dehumidifier?

Whole-house dehumidifiers are designed to work in spaces as large as 3,000 square feet (280 m 2 ). While these units are expensive to buy initially, they can save you money and energy in the long run by helping your air conditioner work more efficiently. ...

What are the factors to consider when sizing a dehumidifier?

There are three main factors to consider when sizing a dehumidifier: Humidity inside the space. Size of the space. Temperature inside the space. I’ll go over them below.

How many pints is a dehumidifier?

So while the dehumidifier is rated at 50-pints under the old standard, it would be rated at 30-pints under the new standard.

How cold does a dehumidifier work?

Most refrigerant dehumidifiers work down to temperatures around 41°F. But if you’re dehumidifying a room at those cold temperatures, don’t expect it to work very well. The lower the space temperature, the worse your dehumidifier will perform.

Why is airflow important in a dehumidifier?

Airflow is important for large spaces because you will need air circulation throughout the entire space to dehumidify it.

How many pints of dehumidifier should I use for a basement?

For an average-sized basement (800 sq. ft.) with high humidity (80%), I’d recommend a 45-pint dehumidifier (2020 standard).

What happens if you put a dehumidifier on one side of a room?

If your dehumidifier is placed on one side of a large open room, then the opposite end of the room might stay humid.

How many pints per day can a dehumidifier remove?

Here’s an example why the standards matter: If you’re buying a 50-pint dehumidifier that’s tested to the old standard, it is capable of removing 50 pints per day when room conditions are 80°F and 60%RH.

Mini Dehumidifier By Size

Mini Dehumidifiers range from 1-4 Pint capacity. Mini dehumidifiers are suitable for around 200 sq feet. Here is our list of the best Mini Dehumidifiers.

Small Dehumidifiers By Size

Small Dehumidifiers range from 5-20 Pint capacity. Small dehumidifiers are suitable for areas that range from 200 sq feet to 400 sq feet. Here is our list of the best Small Space Dehumidifiers.

30 Pint Dehumidifiers By Size

30 Pint Dehumidifiers range from 21-40 Pint capacity. 30 Pint dehumidifiers are suitable for areas that range from 200 sq feet to 800 sq feet. Here is our list of the best 30 Pint Dehumidifiers.

50 Pint Dehumidifiers By Size

50 Pint Dehumidifiers range from 41-60 Pint capacity. 50 Pint dehumidifiers are suitable for areas that range from 600 sq feet to 1200 sq feet. Here is our list of the best 50 Pint Dehumidifiers.

70 Pint Dehumidifiers By Size

70 Pint Dehumidifiers range from 61-80 Pint capacity. 70 Pint dehumidifiers are suitable for areas that range from 800 sq feet to 1600 sq feet. Here is our list of the best 70 Pint Dehumidifiers.

90 Pint Dehumidifiers By Size

90 Pint Dehumidifiers range from 81-100 Pint capacity. 90 Pint dehumidifiers are suitable for areas that range from 1200 sq feet to 2600 sq feet. Here is our list of the best 90 Pint Dehumidifiers.

Large Dehumidifier By Size

Large Dehumidifiers range from 110-160 Pint capacity. Large Pint dehumidifiers are suitable for areas that range from 1600 sq feet to 3500+ sq feet. Here is our list of the best Large Dehumidifiers.

How to select dehumidifiers after calculating the capacity?

Based on the above results, you can select a suitable dehumidifier from our wide range of following dehumidifiers. For all commercial and industrial applications, you may contact our experts for a free assistance.

What is the main principle of a dehumidifier?

This is the major type of dehumidifiers by means of technical classification. Condensation principle is condensing the water of the atmosphere and converting into water. This water is drained out this reducing the humidity of the room. Please see more on condensation dehumidifiers.

What does "above calculated capacity" mean?

This means that (above calculated capacity) liter of water has to be removed from the air to achieve a humidity of (above desired humidity) under the present conditions given by you . Hence while selecting you have to select a dehumidifier accordingly. For all de humidifiers, the capacity is defined as liter per hour, kg per hour etc.

Why is my basement humid?

Basements always have a problem of high humidity since moist air is heavy and tends to settle as low as possible. Also it will not rise automatically to the ground level. If humidity is not controlled in time, it will cause huge damage. Please see more on our basement dehumidifiers.

What is the second type of dehumidifier?

This is the second type of dehumidifiers, which operates using desiccants. They use a moisture absorbing material such as silica gel to absorb the moisture. This will not produce water. These are especially useful for low temperature below 10°C. Please read more on desiccant dehumidifiers.

Why is it better to have multiple dehumidifiers?

The result calculated give you the exact capacity of the required dehumidifier. If the area is big, it is better to select multiple dehumidifiers so that air circulation will be better. Also, this will help in faster dehumidification.

Can you use a hygrometer to check weather?

If you want accurate results especially for industrial and commercial applications, you may take the actual readings using a hygrometer. If you are designing a warehouse with opening to the atmosphere, you can easily check the data from your local weather reports .

What is the most overlooked factor when it comes to what size dehumidifier you need?

Temperature is the most overlooked factor when it comes to what size dehumidifier you need. Most homeowners have a specific situation. Picking the correct size of a dehumidifier is not the simplest task in the world.

How many pints of water can a dehumidifier squeeze?

Let’s start with the capacity of the dehumidifier. You can get a small 30-pint, a medium 50-pint, or the strongest residential 70-pint dehumidifier. This tells you the maximum amount of water (in pints per day) a dehumidifier can squeeze out of your air per day, according to the tests made by DOE.

How much water does a 70 pint dehumidifier take out?

A pint is a weird unit; it amounts to 1/8 of a gallon. In short, the big 70-pint dehumidifier can absorb almost 9 gallons of water out of the house or basement air per day.

What is the most useful resource for dehumidifiers?

The most useful resource is the dehumidifier size chart. AHAM (Association of Home Appliance Manufacturers) has come up with directives on the capacity of dehumidifiers for different relative humidity and area sizes.

How many pints does a dehumidifier have?

The capacity of most residential dehumidifiers ranges from 30 pints to 70 pints.

What is the humidity of a house?

Houses usually have 50% to 70% relative humidity and higher square footage. What really matters when picking the correct size of a dehumidifier are 3 specific factors: Relative humidity rates. They range from 50% to 100%. The purpose of using a dehumidifier is to lower relative humidity to 30% to 50%. Square footage.

Is a 60 pint dehumidifier better than a 50 pint?

Whenever you have this kind of choice between a smaller (50-pint) and bigger (60-pint) dehumidifier, always use the higher capacity. It’s always better to have a more powerful dehumidifier than one that’s too weak to do the job. Do keep in mind that AHAM sizing chart doesn’t take the average temperature into account.

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